Electric-arc lamp



Jan. 15, 1929. 1,698,919

L. S. KUBIAC I ELECTRIC ARC LAMP Filed 26, 1927 3 Sheets-Sheet l Les'l'er 115' .Kubiac,

WITNESS I 5 6H0: new

Jan. 15, 1929. 1,698,919

. L. S. KUBlAC ELECTRIC ARC LAMP Filed. Nov. 26, 1927 3 Sheets-Sheet 2 Le-sier $.Kubiac,

WITNESSJ- I I aflhzwaq Jan. 15,1929. I 1,698,919

L. S. KUBIAC ELECTHRIC ARC LAMP Filed Nov. 26, 1927 3 Sheets-Sheet 3 LesierflKubiac,

W/T1vEss-'- I v 9 61mm,

Patented Jan. 15, 1929.

UNITED STATES PATENT OFFICE.

LESTER S. KUBIAG, OF YOUNGSTOWN, OKIO, ASSIGNOR TO THE PHOTOGENIC MACHINE COMPANY, OF YOUNGSTOWN, OHIO, A CORPORATION OF OHIO.

ELECTRIC-ARC LAMP.

Application filed November 26, 1927. Serial No. 235,809.

This invention relates to electric arc lamps, and more particularly to the multiple type of lamp, involving a clutch bar common to both carbons as set forth in my application Serial No. 147,206 filed November 9, 1926 and allowed May 6, 1927, but involving different mechanism for actuating the clutch bar, the primary purpose being to provide a method of operation in which the carbons will be required to travel a very materially lesser distance than the armature of the solenoid, the relative travel of the two elements being readily adjustable to any predetermined proportions.

I have learned from practice and experience that the starting and stopping of the carbons (in other words, the separation and closing of the carbons for the purpose of establishing and terminating the arc) may be more gently effected by transmitting or communicating the movement from the armature to the carbon through the medium of a lever swingingly connected intermediate its ends with the clutch carrying bar, one end of the lever being secured to the armature and the opposite end pivoted to a rigid support.

A practical embodiment of my invention is shown in the accompanying drawings, in which Fig. 1 is a front elevation; Fig. 2 is an end elevation showing the device in inoperative position (the two carbons in contact) Fig. 3 is a similar view but showing the device in operative position (the two carbons separated and the are established); Fig. 4

' is a plan view on line 44 Fig. 1; and Fig. 5

is a similar view on line 55 Fig. 1.

I house the mechanism of my device in what may be termed an open supporting frame designated generally as F, and consisting of a top or cap plate 1, a bottom or base plate 2, the upright corner posts 33 which tie the cap and base plates together, and the two intermediate columns 44 also rigidly secured to the cap and base plates.

Mounted upon the columns 44 are the two solenoid brackets 5 and 6, and the solenoid 7 is securely held between these two brackets by the bolts 88.

Also slidably mounted upon the columns 44, beneath the bracket 6, by means of relatively long tubular bearings 99, is the clutch bar 10, carrying at each end a clutch element 11 adapted to engage the upper carbon 12.

Rigidly secured to the upper face of the base plate 2 is the upstanding post 13 designed for a purpose hereinafter to be noted.

Also carried by the clutch bar 10, at its longitudinal center, is a similar post 14 also to be hereinafter referred to.

Secured to the cross-head 15 carried on the upper end of the armature stem 16 are the two upstanding bolts 17-17 upon each of which is mounted a coil spring 18.

Also slidably mounted upon bolts 17-17 beneath the springs 18-18, is the cross-bar 19, to the upper face of which is secured the upstanding post 20. Figs. 5 and 2.

Swingingly connected to the post 20, by means of pin 21, are the oppositely disposed upstanding links 2222.

Secured to the lower face of the cap plate 1 is the depending post 23, to the lower end of which is swingingly mounted, intermediate its ends, the lever 24, the inner bifurcated or yoked end 25 of which is pivoted to the upstanding links 2222 carried by the post 20.

Slidably connected with the opposite or outer end of the lever 24 is the bar or link 26, the lower end of which is similarly connected with the outer end of lever 27 which has a loose connection, as at 28, with the post 14 carried by the clutch bar 10, while its opposite or rear end is pivoted in the post 13 carried by the base plate 2, as hereinbefore explained. Figures 2 and 3.

Carried by the cap plate 1 is the ordinary dash pot 29, the stem 30 of which is connected to the upper end of the post 20 carried by the cross-bar 19.

Slidably mounted upon the corner posts 3-3 of the frame are the oppositely disposed carbon holders 31-31, to which the upper carbons 12-12 are secured by the screws 3232.

For the purpose of insulating the carbons and operating elements from the frame of the device, I use the plates or sheets 3333 of asbestos or other suitable material. Fig. 1.

Firmly secured to, and suspended from, the base plate 2 of the frame, is the supporting rod 34, carrying at its lower end an adjustable cross-bar 35 having a relatively long tubular guide bearing 36 held in positionby the screw 37, said cross-bar being provided at each end with oppositely disposed carbon holders 38 38, to which the lower carbons 39-39 are secured by screws 4040.

The operation of my device, briefly stated, is substantially as follows:

When the solenoid is energized, the armature will travel downwardly in the solenoid, carrying with it the bolts 17-17 against the pressure of the springs l818, and when the tension upon these springs is suficient the bar 19 will be forced downwardly, thus draw ing down the links 22-22 and the inner end of the lever 24, to the bifurcated or forked end 25 of which the links are attached. This will raise the free end of the lever 24: and, through the medium of the bar 26, the free end of'the lower lever 27 will also be raised, and as this lever has aloose connection intermediate its ends with the post 14 carried by the clutch bar 10, and a pivoted connection with'the post 13 carried by the base plate 2, the result will be that the clutch bar 10 will be raised, and the clutch elements 1111 carried by the bar 10 will engage the upper carbons, separating them from the lower carbons and starting the building up of the arc.

The relative movement of the various operating elements are so adjusted that when the armature reaches what is known as the point of magnetic balance in the solenoid, the arc will be of proper length for service.

As the carbons burn away, however, the length of the are gradually increases and the strength of the current will correspondingly decrease, until the magnetic strength of the solenoid is no longer suflicient to carry its load, at which time the armature will begin to travel upwardly in the solenoid, and the clutch bar, through reverse action, will fall untilthe clutch elements come into contact with the insulating plates or sheets till-33, which will release the grip upon the upper carbons and permit them to fall until they come into contact with the lower carbons, thus, theoretically, eliminating the arc and extinguishing the light, although the operation is so rapid that it is not perceptible to the eye.

termediate its ends and controlled by said solenoid unit, another lever having a loose connection, intermediate its ends, with said lifting bar and pivoted atone end, and a loose link connect-ion between said two levers. 2. In an arc lamp, a carbon control mecha nism comprising a horizontal lifting bar slidably mounted upon upright supports and carrying at each end a clutch element adapted to engage a carbon, and means for actuating said lifting bar,said actuating means including a solenoid unit, a lever pivoted intermediate its ends and having a swinging con nection with the upper end of the armature of said solenoid unit, another lever having a loose connection, intermediate its ends, with said lifting bar and pivoted at one end, and a loose link connection between said two levers.

3. In an arc lamp, a carbon control mechanism comprising a horizontal lifting bar slidably mounted upon upright sup-ports and carrying at each end a clutch element adapted to engage a carbon, and means for actu- V ating said lifting ban-said actuating means including a solenoid unit, a lever pivoted intermediate its ends and having a .lOOSQTlll'lk connection with the upper end of the armature of the solenoid unit, another lever pivoted at one end and h aving a loose connection, intermediate its ends, with said lifting bar, and a loose link connection between said two levers.

In testimony whereof, I have hereunto affixed my signature.

LESTER S. KUBIAC. 

